Apps can not connect to EDGE

[Smety]

Hi,

I have got old BB 8900. Everything is ok, but I have problem with EDGE Connection. The applications (most often Opera Mini 6.5) can not connect to EDGE. I use my BB so:

1) I am at work, use the Opera Mini via EDGE. Everything´s ok yet.

2) I connect to wifi, use the Opera Mini. Everything´s ok yet.

3) Now I turn off wifi and I want to connect to EDGE to browse. Opera Mini can not connect - Connection has been interrupted. When I connect to wifi, Opera Mini connect and I can browse internet.

I tried turn it off and on (MENU -> Turn OFF) but it doesn´t help. I must remove battery, turn it on and then will be Opera Mini connect to EDGE.

And this is the same with other applications too. But integrated browser is working! I can browse via integrated browser, but it is uncomfortable.

I am using my BB without BIS yet, O2 Czech Republic, RIM OS v5.0.0.681 (platform 5.2.0.67). I thing that everything is up to date.

Please, does anybody know any solution? Thank you

(I am sorry for my English, it´s terrible.)